2

Training :
Youre new to weight training, circuits are great to isolate and get proper movement, then moving on to weights is a good idea. The best thing you can do is seek out a personal trainer for a few sessions, they'll be able to assess your level o fitness and design plans accordingly. Staying in touch with your trainer then can elevate you to next level and help you reach your goals.
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4

Interval training :
Interval training, or increasing you effort for short periods of time, count about double w regard to calorie burn or "fat burn" than standard "target" heart rateexercise. Interval training can be accomplished on a treadmill, or in the context of any type of exercise.
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6

Real question?:
What are you really asking? Both will burn off fat and help you lose calories. Intensity and duration determine how much for each activity, more important is your goal: aerobic exercise strengthens the heart and physical endurance more; strength training improves power, bone health, and lean body mass reserves. Both are essential/help appearance, but obviously one may be more important for you.
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8

Yes:
You are nicely combining three different forms of aerobic conditioning exercises. Rowing and cycling activities are heart friendly as well as joint friendly; good exercise for the cardiovascular system without beating up your joints. Of the three, the treadmill has more impact on your knees and ankles as you run. Would advise keep in the treadmill flat as opposed to inclined. Easier on the knees.
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12

Even better:
it will have you NOT lose muscle. While the calories burned from exercise is not necessarily all that much (200-600 calories per hour; very hard to measure on resistance) if you have net calories out by starvation, mostly you lose muscle. With resistance, its fat.
https://www.kickstarter.com/projects/1775472781/devils-diet maybe helpful, certainly entertaining.
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15

You can get an effective aerobic workout with both an elliptical machine and a treadmill:
In general, you can let your fitness goals determine whether you choose an elliptical machine or a treadmill — or a different piece of exercise equipment. However, elliptical machines might offer some advantages over treadmills. For example: Using an elliptical machine can be less stressful on your knees, hips and back than is running on a treadmill. Walking on a treadmill, however, exerts about the same force as using an elliptical machine. , Unlike treadmills, some elliptical machines are equipped with movable upper body handles or poles, similar to ski poles. These allow you to exercise both your arms and your legs. , Most elliptical machines can be pedaled in reverse, which allows you to work your calf and hamstring muscles a bit more than does forward motion. . Using an elliptical machine is generally considered low impact. An elliptical machine might be a good alternative to jogging, whether on a treadmill or outside. An elliptical trainer shouldn't cause knee pain if you're using it correctly. You may experience knee pain, though, if you have an underlying knee problem, such as degenerative arthritis. With certain knee injuries, using a stationary bike might be a more appropriate option than using an elliptical machine. Talk to your doctor about what exercise is right for you if you have any injuries or health concerns. And what if you're training for a 5K run or other road race? A treadmill is probably a better tool to prepare you for running events. But even if running is your main aerobic fitness activity, cross-training with an elliptical machine or other low-impact exercise equipment can help keep you fresh and prevent overload injuries. If you use an elliptical machine, remember to maintain good posture to help ensure the most effective workout. Keep your shoulders back, your head up and your abdominal muscles tight. Look forward, not down at your feet. And don't lean on the handles — let your lower body support your weight.
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16

All things in moder:
all things in moderation. in general the american college of cardiology recommend 60 minutes of get-your-heart-rate-up exercise 5 days/wk if you're in shape - 90 minutes if you're not. that being said - "extreme" athleticism might be bad for you and shorten your life. (100 mile marathon runs, climbing mount everest)
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17

Strength training:
Training your muscles for increased strength and endurance should be a gradual process to avoid injuries. Lifting your own body weight such as in pushups, pullups, squats, lunges has similar benefit for staying fit. A good healthy diet plan is a must. Avoid junk calories and focus on nutrition with veggies and fruits. Stay regular and consistent. Good luck.
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18

Weight loss:
I put together routines from bodybuilding.Com. They have great articles on circuit training. Now, I have to stress this, abs are made in the kitchen! eating healthy, high protein, mod carb, mod fat will induce a more rapid weight loss in addition to the circuit training then circuit training alone. Rapid weight loss is always rapidly put back on, so find something u can do longterm.
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